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关于产脂力的问题,涉及面较广,影响因子较多,研究淘汰低产树,充分利用高产脂力立木,是增产松脂的主要技术措施之一。自1960年起,根据我个人二十年来的实践认识和调查研究,现将贵州地区马尾松单株产脂力情况的研究报告如下,供有关单位参考。一、产脂力与单位面积纵生树脂道切割数的关系在同一立地条件下的同品种、同径级和结实量相近似的采脂立木中,在施用同样的间隔期和复割侧沟总长度相等的情况下,切割单位面积纵生树脂道数量的多少,在产脂力上是有显著差别的,见表1。
On the issue of fat production, involving a wider area, more influential factors, research to eliminate low-yield trees, full use of high-yielding fat stand, is one of the main technical measures to increase production of rosin. Since 1960, based on my personal understanding and investigation of two decades of practice, the report on the yield per plant of Pinus massoniana from Guizhou is as follows, for the reference of the relevant units. First, the fat yield per unit area of the number of vertical and the number of resinous cut in the same site under the same species, with the diameter class and the amount of similar fruiting stand in the same interval and compound ditches The total length of the case of the same, cut the number of longitudinal per unit area of the number of resin, in the fat is a significant difference, as shown in Table 1.